Civil Engineering Photos

Archives

Categories

‘Sewer’ Tag

Shown here is the repair of the top part of a manhole. This structure is a catch basin, as indicated by the type of cover. This cover is designed to be placed in line with a curb in a roadway. The fresh concrete that is supporting the cover in this photo could be called a riser or corbel. Usually, the riser is above the corbel, which is a cone shaped section which flares down into the structure. Since this is a repair, the riser and corbel are basically 2-in-1. The reason this catch basin was repaired was the settlement of the roadway over time which caused the drainage to become unlevel.

This is the outlet of a storm sewer system. These outlets provide a key link from the underground storm water systems found under most roads in urban areas, and the natural waterways of the watershed. Though most are hidden within brush or placed less visible places, this one is easily visible in the retaining wall near a dam.

This is a special kind of sinkhole probably caused by the failure of a storm sewer system connection. Sinkholes like this one form when and where a sewer pipe fails, allowing rainwater to wash earth material into the pipe and down the system. When the earth is washed away, the above material collapses down causing a hole to form. Due to the close proximity of this sinkhole to a catch basin, this sink hole was probably caused by a failure of the connection of the sewer pipe to the structure.